Headlining our summary of street art this week is this fantastic new mural on the back of some abandoned substation just outside Sheffield from Phlegm of which you can see more detailed pics here. Other notable pieces this week include Know Hope (Israel), Escif (Spain), Zilda (Italy), C215 (Italy), Ludo (France), Shepard Fairey (Texas), Stinkfish (Columbia), Nod Young (China), ROID, and Mesa.